From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joerg Roedel Subject: Re: [PATCH] iommu/arm-smmu: add a shortcut when the @dev_node is NULL Date: Wed, 20 Jan 2016 13:02:25 +0100 Message-ID: <20160120120225.GD18805@8bytes.org> References: <1452564905-2662-1-git-send-email-shijie.huang@arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: <1452564905-2662-1-git-send-email-shijie.huang-5wv7dgnIgG8@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: Huang Shijie Cc: iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, nd-5wv7dgnIgG8@public.gmane.org, will.deacon-5wv7dgnIgG8@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org List-Id: iommu@lists.linux-foundation.org On Tue, Jan 12, 2016 at 10:15:05AM +0800, Huang Shijie wrote: > This patch adds a shortcut for the code when the @device_node is NULL. > In my juno-r1 board, the boot time can be faster by 0.004014s. How have you made sure this number is reliable and not just noise in the boot process? Joerg